Cryogenic machine for machining cemented carbide

Abstract

The application relates to the technical field of deep cooling equipment, in particular to a deep cooling machine for hard alloy machining, which comprises a machine shell, a spraying assembly and a placing assembly, the placing assembly comprises a positioning strip, a movable rod and a placing disc, the positioning strip is fixedly arranged in the interior of the machine shell, the movable rod is rotatably arranged at the center of the machine shell, the first fixing groove is arranged on the placing disc, the first fixing groove extends from the center of the placing disc to the side wall of the placing disc, two rotating discs are rotatably arranged on the placing disc, the first groove capable of fixing the horizontal height of the placing disc is arranged on the positioning strip, when the axis of the placing disc is coaxial with the axis of the movable rod, the two rotating discs rotate. The application ensures that the hardness and strength of the alloy placed on the placing disc after treatment are uniform, the treated alloy can be quickly taken out and moved to a storage position, then new alloy is driven to carry out cooling treatment, and the machining efficiency of the overall cooling process is improved.

Description

Technical Field

[0001] This invention relates to the field of cryogenic equipment technology, specifically to a cryogenic machine for cemented carbide processing. Background Technology

[0002] Cryogenic treatment of cemented carbide typically involves cooling the carbide with liquid nitrogen, allowing the workpiece temperature to reach below -190°C. However, existing technologies suffer from uneven liquid nitrogen spraying, resulting in inconsistent contact between the cemented carbide and the liquid nitrogen, which in turn affects the alloy's strength and hardness.

[0003] Chinese patent CN218666139U discloses a cryogenic treatment device for cemented carbide. The device uses a motor, drive shaft, second bevel gear, and first bevel gear to rotate the output pipe and spray pipe, thereby performing a comprehensive, multi-angle, and uniform liquid nitrogen spray treatment on the alloy placed on a shelf. However, this method changes the output direction of the spray pipe by rotating it. This change alters the distance between the spray pipe's output end and the alloy, potentially causing the liquid nitrogen to be sprayed to the wrong location. Consequently, the amount and location of liquid nitrogen on different parts of the alloy vary, leading to uneven strength and hardness. Furthermore, the alloy remains at a low temperature for a certain period after liquid nitrogen treatment, making it inconvenient for workers to remove the treated alloy. Summary of the Invention

[0004] To address the aforementioned issues, a cryogenic machine for machining cemented carbide is provided. A storage tray allows the alloy to be retrieved from inside the machine housing, eliminating the need to touch the alloy during transfer. A positioning bar ensures the storage tray inside the housing is positioned at the output end of the spray assembly. The combination of a movable rod and a rotating disk allows the surface of the alloy at the output end of the spray assembly to be changed while minimizing distance variations.

[0005] To address the problems of existing technologies, a cryogenic machining center for cemented carbide is provided, comprising a housing, a spray assembly, and a storage assembly. The storage assembly includes a positioning bar, a movable rod, and a storage tray. The positioning bar is fixedly disposed inside the housing, with its length direction parallel to the height direction of the housing. The movable rod is rotatably disposed at the center of the housing, with its axis parallel to the height direction of the housing. A first fixing groove is formed on the storage tray, extending from the center of the storage tray to its side wall. Two rotating disks are rotatably disposed on the storage tray, with their axes parallel to the axis of the storage tray. The two rotating disks are mirror images of each other with the first fixing groove as their center line. A first groove is formed on the positioning bar to fix the horizontal height of the storage tray. There is at least one first groove, and all the first grooves are evenly distributed along the length direction of the fixing bar. When the axis of the storage tray is coaxial with the axis of the movable rod, the two rotating disks rotate, and the output end of the spray assembly points upwards towards the rotating disks.

[0006] Preferably, the storage tray includes a first gear and a second gear. The first gear is rotatably and coaxially disposed inside the storage tray. The first gear has a second fixing groove that can slide radially with the movable rod. A positioning block is disposed in the first gear. The movable rod has a positioning hole for the positioning plate to be inserted. The number of positioning holes is at least one. All positioning holes are evenly arranged along the axial direction of the movable rod. The second gear is rotatably disposed inside the storage tray and is coaxially and fixedly connected to the rotating disk.

[0007] Preferably, the first gear further includes a first elastic connector, the positioning block is slidably disposed inside the first gear, the sliding direction of the positioning block is parallel to the length direction of the second fixing groove, one end of the first elastic connector is fixedly connected to the positioning block, and the other end of the first elastic connector is fixedly connected to the first gear.

[0008] Preferably, a limiting groove is provided on the positioning block, the length direction of the limiting groove is parallel to the sliding direction of the positioning block, and a first limiting shaft that can slide and cooperate with the limiting groove is fixedly provided in the first gear.

[0009] Preferably, the storage assembly also includes a timing belt, and the second gear is a double gear, with the timing belt being connected to the small-diameter gears on the two second gears via a transmission connection.

[0010] Preferably, the storage tray further includes a rack and a second elastic connector. The rack is slidably disposed inside the storage tray and meshes with a first gear. The sliding direction of the rack is parallel to the length direction of the first fixing groove. One end of the second elastic connector is fixedly connected to the rack, and the other end of the second elastic connector is fixedly connected to the storage tray. Two first positioning strips that slide along the axis of the first gear are provided on each of the two long sides of the second fixing groove. A third elastic connector is fixedly disposed between the two first positioning strips located on the same side of the second fixing groove.

[0011] Preferably, the two ends of the first positioning strip along the length direction of the second fixing groove are set as inclined surfaces, and the movable rod is coaxially provided with a first annular groove that can slide and cooperate with the inclined surface on the first positioning strip. The number of first annular grooves is at least one, and all the first annular grooves are evenly arranged along the axial direction of the movable rod.

[0012] Preferably, two second limiting shafts are fixedly provided on the first gear and evenly arranged around the axis of the first gear. The axis of the second limiting shaft is parallel to the axis of the first gear, and a second annular groove is provided on the tray that can slide with the second limiting shaft.

[0013] Preferably, two second positioning strips are slidably disposed in the first groove, the sliding direction of the second positioning strips is parallel to the length direction of the positioning strips, and a fourth elastic connector is fixedly disposed between the two second positioning strips in the same groove. A second groove that can slide and cooperate with the second positioning strips is provided at one end of the first fixed groove away from the center of the tray. The second positioning strips are trapezoidal and the second grooves are convex.

[0014] Preferably, a handle for gripping is fixedly provided on the side of the tray away from the first fixing groove.

[0015] The advantages of this invention compared to the prior art are:

[0016] This invention enables the alloy to be retrieved from inside the housing without touching it during transfer by using a storage tray. A positioning bar ensures the alloy is positioned at the output end of the spray assembly by the storage tray inside the housing. The combination of a movable rod and a rotating disk allows the surface of the alloy at the output end of the spray assembly to be rotated while maintaining minimal distance variation. This ensures that the amount and position of liquid nitrogen sprayed on the alloy's surface are similar during cooling inside the housing, guaranteeing uniform hardness and strength of the alloy placed on the storage tray after treatment. Furthermore, it allows for the rapid retrieval of treated alloys and their movement to a storage location before new alloys are cooled, thus improving the overall processing efficiency of the cooling process. Attached Figure Description

[0017] Figure 1This is a three-dimensional cross-sectional view of a deep cryogenic machine for machining cemented carbide.

[0018] Figure 2 A schematic diagram of the internal structure of the casing of a cryogenic machine made of cemented carbide. Figure 1 .

[0019] Figure 3 A schematic diagram of the internal structure of the casing of a cryogenic machine made of cemented carbide. Figure 2 .

[0020] Figure 4 yes Figure 3 A magnified view of part A in the diagram.

[0021] Figure 5 Schematic diagram of the internal structure of a cryogenic chamber made of cemented carbide Figure 3 .

[0022] Figure 6 yes Figure 5 A magnified view of part B in the diagram.

[0023] Figure 7 This is a 3D schematic diagram of the storage tray in the storage component.

[0024] Figure 8 This is a three-dimensional sectional view of the storage tray in the storage component.

[0025] Figure 9 yes Figure 8 A magnified view of part C in the diagram.

[0026] Figure 10 This is a three-dimensional exploded view of the storage tray in the storage component.

[0027] The numbers on the map are:

[0028] 1-Housing; 2-Spray assembly; 3-Storage assembly; 31-Positioning strip; 311-First groove; 312-Second positioning strip; 313-Fourth elastic connector; 32-Modular rod; 321-Positioning hole; 322-First annular groove; 33-Storage tray; 331-First fixing groove; 332-Rotating disk; 333-First gear; 3331-Second fixing groove; 3332-Positioning block; 3333-First elastic connector; 3334-Limiting slide groove; 3335-First limiting shaft; 3336-First positioning strip; 3337-Third elastic connector; 3338-Second limiting shaft; 334-Second gear; 335-Rack; 336-Second elastic connector; 337-Second annular groove; 338-Second groove; 339-Handle; 34-Synchronous belt. Detailed Implementation

[0029] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0030] See Figures 1-3 As shown, a deep cryogenic machine for machining cemented carbide includes a housing 1, a spray assembly 2, and a storage assembly 3. The storage assembly 3 includes a positioning bar 31, a movable rod 32, and a storage tray 33. The positioning bar 31 is fixedly disposed inside the housing 1, and its length direction is parallel to the height direction of the housing 1. The movable rod 32 is rotatably disposed at the center of the housing 1, and its axis is parallel to the height direction of the housing 1. A first fixing groove 331 is formed on the storage tray 33, extending from the center of the storage tray 33 to the side wall of the storage tray 33. The device is equipped with two rotating disks 332, the axis of which is parallel to the axis of the storage tray 33. The two rotating disks 332 are mirror images of each other with the first fixing groove 331 as the center line. The positioning strip 31 has a first groove 311 that can fix the horizontal height of the storage tray 33. There is at least one first groove 311. All the first grooves 311 are evenly arranged along the length of the fixing strip. When the axis of the storage tray 33 is coaxial with the axis of the movable rod 32, the two rotating disks 332 rotate, and the output end of the spray assembly 2 points upward to the rotating disks 332.

[0031] The alloy requiring cryogenic treatment is placed on the rotating disk 332. Then, the first fixing groove 331 on the placement tray 33 is aligned with the movable rod 32 and inserted along its diameter. As the movable rod 32 moves a certain distance closer to the center of the placement tray 33 within the first fixing groove 331, the positioning strip 31 is also inserted into the first fixing groove 331. When the axis of the movable rod 32 is coaxial with the axis of the placement tray 33, the positioning strip 31 is fully inserted into the first fixing groove 331, fixing the height of the placement tray 33. The casing 1 is then closed to seal it. Liquid nitrogen is sprayed from the spray assembly 2, and the movable rod 32 is rotated. As the movable rod 32 rotates, the alloy placed on the rotating disk 332 rotates around its own center. After the alloy's cooling process is complete, the casing 1 is opened, the placement plate is removed, and the plate is placed at an angle. The plate allows the processed alloy to be stored. Compared with the prior art, the storage tray 33 of the present invention can be taken out from inside the housing 1, so that the processed alloy can be transferred without touching the alloy. The positioning strip 31 ensures that the storage tray 33 inside the housing 1 can keep the alloy at the output end of the spray assembly 2. The cooperation of the movable rod 32 and the rotating disk 332 allows the surface of the alloy at the output end of the spray assembly 2 to be changed while keeping the distance change small. This ensures that the amount and position of liquid nitrogen sprayed on the surface of the alloy are similar when the alloy is cooled inside the housing 1. This ensures that the hardness and strength of the alloy placed on the storage tray 33 remain uniform after treatment. It also allows the processed alloy to be quickly taken out and moved to the storage position before driving the new alloy to be cooled, thus improving the processing efficiency of the overall cooling process.

[0032] See Figure 5 - Figure 10 As shown: The storage tray 33 includes a first gear 333 and a second gear 334. The first gear 333 is rotatably and coaxially disposed inside the storage tray 33. The first gear 333 has a second fixing groove 3331 that can slide radially with the movable rod 32. A positioning block 3332 is disposed in the first gear 333. The movable rod 32 has a positioning hole 321 for the positioning plate to be inserted. The number of positioning holes 321 is at least one. All positioning holes 321 are evenly arranged along the axial direction of the movable rod 32. The second gear 334 is rotatably disposed inside the storage tray 33. The second gear 334 is coaxially and fixedly connected to the rotating disk 332.

[0033] When the movable rod 32 is inserted into the first fixed groove 331 and coaxial with the first gear 333, the positioning block 3332 is inserted into the positioning hole 321, and the positioning strip 31 is fixed to the position of the tray 33. When the movable rod 32 rotates, it will drive the first gear 333 to rotate. The first gear 333 will then drive the two meshing second gears 334 to rotate. The second gears 334 will drive the rotating disk 332, which is coaxially fixedly connected to them, to rotate. Compared with the prior art, the positioning block 3332 and the positioning hole 321 of the present invention cooperate to enable the movable rod 32 to drive the first gear 333 and the second gear 334 to rotate, so that the alloy on the rotating disk 332 can rotate around the axis on the rotating disk 332.

[0034] See Figures 7-10 As shown: The first gear 333 also includes a first elastic connector 3333, and a positioning block 3332 is slidably disposed inside the first gear 333. The sliding direction of the positioning block 3332 is parallel to the length direction of the second fixing groove 3331. One end of the first elastic connector 3333 is fixedly connected to the positioning block 3332, and the other end of the first elastic connector 3333 is fixedly connected to the first gear 333.

[0035] When the movable rod 32 is inserted into the first fixed groove 331 and coaxial with the first gear 333, if the positioning block 3332 is not inserted into the positioning hole 321 at this time, the positioning block 3332 moves into the interior of the first gear 333, and the first elastic connector 3333 is compressed. After the movable rod 32 rotates and moves by an angle, the first elastic connector 3333 recovers its deformation, and the positioning block 3332 is inserted into the positioning hole 321 under the action of the first elastic connector 3333. Compared with the prior art, the first elastic connector 3333 of the present invention makes the positioning block 3332 tend to move outward of the first gear 333, thereby ensuring that the positioning block 3332 can be stably inserted into the positioning hole 321.

[0036] See Figures 7-10 As shown: A limiting groove 3334 is provided on the positioning block 3332. The length direction of the limiting groove 3334 is parallel to the sliding direction of the positioning block 3332. A first limiting shaft 3335 that can slide and cooperate with the limiting groove 3334 is fixedly provided in the first gear 333.

[0037] After the first elastic connector 3333 recovers its deformation, the positioning block 3332 is inserted into the positioning hole 321 and moves a certain distance. Then, the first limiting shaft 3335 contacts the end of the limiting slide groove 3334. Compared with the prior art, the first limiting shaft 3335 and the limiting slide groove 3334 of the present invention cooperate to limit the movement range of the positioning block 3332, thereby preventing the positioning block 3332 from colliding with the movable rod 32.

[0038] See Figure 10 As shown: The storage assembly 3 also includes a timing belt 34, and the second gear 334 is a double gear. The timing belt 34 is connected to the small-diameter gears on the two second gears 334.

[0039] The first gear 333 drives two meshing second gears 334 to rotate. When the notch on the first gear 333 is in contact with one of the second gears 334, the first gear 333 will not be able to drive the second gear 334 to rotate. The other second gear 334 will drive the aforementioned gear to rotate through the timing belt 34. Compared with the prior art, the timing belt 34 of the present invention enables the two second gears 334 to rotate synchronously, thereby avoiding the second gear 334 from being unable to rotate when the notch on the first gear 333 is in contact with the second gear 334.

[0040] See Figures 7-10 As shown: The storage tray 33 also includes a rack 335 and a second elastic connector 336. The rack 335 is slidably disposed inside the storage tray 33 and meshes with the first gear 333. The sliding direction of the rack 335 is parallel to the length direction of the first fixing groove 331. One end of the second elastic connector 336 is fixedly connected to the rack 335, and the other end of the second elastic connector 336 is fixedly connected to the storage tray 33. Two first positioning bars 3336 that slide along the axis of the first gear 333 are provided on both long sides of the second fixing groove 3331. A third elastic connector 3337 is fixedly disposed between the two first positioning bars 3336 on the same side of the second fixing groove 3331.

[0041] When the second fixing groove 3331 on the first gear 333 is inside the tray 33, the third elastic connector 3337 is compressed, causing the first positioning strip 3336 to be inside the second fixing groove 3331. At this time, the second elastic connector 336 restores its deformation, thereby pushing the rack 335 to move. The rack 335 moves, thereby driving the first gear 333 to rotate. When the first gear 333 rotates to the point where the first fixing groove 331 and the second fixing groove 3331 coincide, the third elastic connector 3337 restores its deformation, and the first positioning strip 3336 protrudes into the second fixing groove 3331, thereby preventing the first gear 333 from continuing to rotate. Compared with the prior art, the rack 335, the second elastic connector 336, the first positioning strip 3336, and the third elastic connector 3337 of the present invention cooperate to limit the orientation of the second fixing groove 3331, thereby ensuring that the movable rod 32 can move to a state coaxial with the first gear 333.

[0042] See Figures 5-9As shown: the two ends of the first positioning strip 3336 along the length direction of the second fixing groove 3331 are set as inclined surfaces, and the movable rod 32 is coaxially provided with a first annular groove 322 that can slide and cooperate with the inclined surface on the first positioning strip 3336. The number of first annular grooves 322 is at least one, and all the first annular grooves 322 are evenly arranged along the axial direction of the movable rod 32.

[0043] The movable rod 32 approaches the first gear 333 in the first fixed groove 331. The first annular groove 322 will first contact the inclined surface on the first positioning strip 3336. Then the third elastic connector 3337 is compressed, and the first positioning strip 3336 moves into the second fixed groove 3331. Compared with the prior art, the first annular groove 322 of the present invention allows the first positioning strip 3336 to retract into the second fixed groove 3331 when the first gear 333 and the movable rod 32 are coaxial, so that the first positioning strip 3336 will not block the movable rod 32 from driving the first gear 333 to rotate.

[0044] See Figures 8-10 As shown: Two second limiting shafts 3338 are fixedly arranged on the first gear 333 and evenly arranged around the axis of the first gear 333. The axis of the second limiting shaft 3338 is parallel to the axis of the first gear 333. The storage tray 33 is provided with a second annular groove 337 that can slide with the second limiting shaft 3338.

[0045] When the first gear 333 rotates, the second limiting shaft 3338 will always slide in the second limiting groove. Compared with the prior art, the second limiting shaft 3338 and the second limiting groove of the present invention limit the position of the first gear 333, thereby preventing the first gear 333 from changing position and thus not meshing with the second gear 334.

[0046] See Figures 3-4 As shown: Two second positioning strips 312 are slidably disposed in the first groove 311. The sliding direction of the second positioning strips 312 is parallel to the length direction of the positioning strips 31. A fourth elastic connector 313 is fixedly disposed between the two second positioning strips 312 in the same groove. A second groove 338 is provided at one end of the first fixed groove 331 away from the center of the tray 33, which can slide and cooperate with the second positioning strips 312. The second positioning strips 312 are trapezoidal and the second groove 338 is convex.

[0047] When the second positioning strip 312 just contacts the second groove 338, the two second positioning strips 312 in the same first groove 311 move closer to each other, and the fourth elastic connector 313 is compressed. When the second positioning strip 312 moves to the bottom of the second groove 338, the fourth elastic connector 313 recovers its deformation, and the two second positioning strips 312 move away from each other. Compared with the prior art, the cooperation of the second positioning strip 312, the fourth elastic connector 313 and the second groove 338 of the present invention makes the tray 33 unable to move radially at will, thereby ensuring that the position of the alloy will not change easily.

[0048] See Figure 5 As shown: A handle 339 for holding is fixedly provided on the side of the tray 33 away from the first fixing groove 331.

[0049] The staff member holds the handle 339 and pushes the storage tray 33 to move it. Compared with the prior art, the storage tray 33 of the present invention can be removed from the inside of the housing 1, thereby avoiding the staff member from directly contacting the cooled alloy and being injured.

[0050] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A deep cryogenic machine for machining cemented carbide, comprising a housing (1), a spray assembly (2), and a storage assembly (3), characterized in that, The storage component (3) includes a positioning bar (31), a movable rod (32), and a storage tray (33); The positioning strip (31) is fixedly installed inside the housing (1), and the length direction of the positioning strip (31) is parallel to the height direction of the housing (1); The movable rod (32) is rotatably set at the center of the housing (1), and the axis of the movable rod (32) is parallel to the height direction of the housing (1); The storage tray (33) is provided with a first fixing groove (331), which extends from the center of the storage tray (33) to the side wall of the storage tray (33). The storage tray (33) is provided with two rotating disks (332) that can rotate. The axis of the rotating disks (332) is parallel to the axis of the storage tray (33). The two rotating disks (332) are mirror images of each other with the first fixing groove (331) as the center line. The positioning strip (31) is provided with a first groove (311) that can fix the horizontal height of the storage tray (33). The number of first grooves (311) is at least one. All the first grooves (311) are evenly arranged along the length of the fixing strip. When the axis of the storage tray (33) is coaxial with the axis of the movable rod (32), the two rotating disks (332) rotate. The output end of the spray assembly (2) points to the top of the rotating disks (332). The storage tray (33) includes a first gear (333) and a second gear (334); the first gear (333) is rotatably and coaxially disposed inside the storage tray (33), and the first gear (333) is provided with a second fixed groove (3331) that can be radially slidably engaged with the movable rod (32). A positioning block (3332) is provided in the first gear (333), and a positioning hole (321) is provided on the movable rod (32) for the positioning plate to be inserted. The number of positioning holes (321) is at least one, and all positioning holes (321) are evenly arranged along the axial direction of the movable rod (32). The second gear (334) is rotatably disposed inside the storage tray, and the second gear (334) is coaxially and fixedly connected to the rotating disk (332).

2. The cryogenic machine for cemented carbide machining according to claim 1, characterized in that, The first gear (333) also includes a first elastic connecting member (3333); The positioning block (3332) is slidably disposed inside the first gear (333). The sliding direction of the positioning block (3332) is parallel to the length direction of the second fixed groove (3331). One end of the first elastic connector (3333) is fixedly connected to the positioning block (3332), and the other end of the first elastic connector (3333) is fixedly connected to the first gear (333).

3. The cryogenic machine for cemented carbide machining according to claim 2, characterized in that, A limiting groove (3334) is provided on the positioning block (3332). The length direction of the limiting groove (3334) is parallel to the sliding direction of the positioning block (3332). A first limiting shaft (3335) that can slide and cooperate with the limiting groove (3334) is fixedly provided in the first gear (333).

4. A deep cryogenic machine for cemented carbide machining according to claim 3, characterized in that, The storage component (3) also includes a timing belt (34); The second gear (334) is a double gear, and the synchronous belt (34) is connected to the small-diameter gears on the two second gears (334).

5. A deep cryogenic machine for cemented carbide machining according to claim 4, characterized in that, The tray (33) also includes a rack (335) and a second resilient connector (336); The rack (335) is slidably disposed inside the storage tray (33) and meshes with the first gear (333). The sliding direction of the rack (335) is parallel to the length direction of the first fixed groove (331). One end of the second elastic connector (336) is fixedly connected to the rack (335), and the other end of the second elastic connector (336) is fixedly connected to the storage tray (33). Two first positioning bars (3336) that slide along the axis of the first gear (333) are provided on both long sides of the second fixed groove (3331). A third elastic connector (3337) is fixedly disposed between the two first positioning bars (3336) located on the same side of the second fixed groove (3331).

6. A cryogenic machine for cemented carbide machining according to claim 5, characterized in that, The first positioning bar (3336) has inclined surfaces at both ends along the length of the second fixing groove (3331). The movable rod (32) has a first annular groove (322) that can slide and cooperate with the inclined surface on the first positioning bar (3336). The number of first annular grooves (322) is at least one, and all the first annular grooves (322) are evenly arranged along the axial direction of the movable rod (32).

7. A cryogenic machine for cemented carbide machining according to claim 6, characterized in that, Two second limiting shafts (3338) are fixedly arranged on the first gear (333) and evenly arranged around the axis of the first gear (333). The axis of the second limiting shaft (3338) is parallel to the axis of the first gear (333). A second annular groove (337) is provided on the placement plate that can slide with the second limiting shaft (3338).

8. A cryogenic machine for cemented carbide machining according to claim 7, characterized in that, Two second positioning strips (312) are slidably arranged in the first groove (311). The sliding direction of the second positioning strips (312) is parallel to the length direction of the positioning strips (31). A fourth elastic connector (313) is fixedly arranged between the two second positioning strips (312) in the same groove. A second groove (338) is opened at the end of the first fixed groove (331) away from the center of the placement plate, which can slide and cooperate with the second positioning strips (312). The second positioning strips (312) are trapezoidal and the second grooves (338) are convex.

9. A cryogenic machine for cemented carbide machining according to any one of claims 1-8, characterized in that, A handle (339) for holding is fixedly provided on the side of the placement plate away from the first fixing groove (331).

Images